Saw holder



Oct. 21, 1930. "c w. BRAcvzKETT SAW HOLDER Filed Deo. 51. 1929 Eig - 5means confined totliis class of work,"

Pmeafieeioct;21,1930i i i i 117,778,995

k- CHARLES `W. .BRACKETT`, on TAKMA1PARK,.MARYLAND' i i' Y [fsAWiHoLDERl i Application -aieafnecember 31,@1929. semi no. 417,794.'y

j This invention relates to sawsof the type `mediateportionbeingbrokenaway, 'theken-V 'particularly adapted forcuttingthemetallic j tire Vadjustment in this instance beingmade ,f sheath ofarmored flexible Qelectricalconduc- 'from the handle end g, and ,l l jtors, although itslfield of usefulnessis'by'no Figure 7 is vanunderneath. view ofanotlier l 'slightly modiiedform vroffthe inventionvin *55 Y One of the objects ofthe invention is the which the handleandblade are interlocked, provision of a holder which will. cooperatedefinitely'alloeating thehandle withlrespect v `withthe ordinarycommercialformof 'hack' to the-blade and preventing inadvertent `ro,vsaw blade to holdl the samein position rand to ,tation of thehandlewit-h respect to the bladeL iii-support it insuehamanner'astoprevent latlvvh'enthe device is iniise. c. 60j;

`eral bending of the blade, and to gage 'the Referring 'now in'det'ailvto'theseverfal-fg- Y depth ofthe cut vwhe'rebyin the use of the ures,andliist adverting to that'fforin of blade only the armor and not theenclosed the invention shown in Figures 1,2,23 andZl, wireslare severed;f the numeral l represents a bodyof the'hold'er `15 "Another'object" ofthe invention is tofpro-l which is made fromva'sectionoflgpip'e,thread"j65 I *se Ap1aceeven though'the blade. be broken, aSv'li.y

Vvide a vhaclrsaw bladeholderfor thepiirpose iedat both ends; ,'Thepipeis long itiidfina llyAv^ stated, the construction of which'cooperates'jslotted'as shownfat 2 i'ijFigures2,13 and 2l, f f with theconvexshape'a't the ends ofthe ordia handley 3 being vfscrewable upon.one end nary hack saw` blade, to'retain the blade in while 'a nut'iengages kthe threadsfat theother u' v c um well as to ensure that vit issupported against v Figures 3 and4s'liow` thatfthelislot 21,151 ,y ltherigid backing of the holder, which posijuste-wide enough to Yreceiverthesaw (blade, tion'of the blade determines thel proper depth the latterbeing; designated, byftlie numeral M l vof the'cut. l 'i 5'Aandi thatthe diameter of the pipe of which# 125 v A .further objectfoftheinvention isc'the'f then-section l isV made is selected with'refer-YI construction of a hack'fsaw blade holder of ence to 'the-"width ofthesaw blade so that extreme simplicity havingal gross adjustment awidtlivportion 6, of the blade projectswhicli j by' means of which its holdingcapacity may is exactly thedepth' ofthefdesired cu'tlfQTlhe be variedto'take blades of.V various lengths, vsection ljtliusa'cts las a gage indeterrnin'ingY v the blade in theholdenjfy Y i 'i El) 'and an additionaladjustmentfor tightening that the saw blade lsha-ll kbe ,capableoffcuttingfso' c through the metallici-sheath ofthe armored j Otherobjects of the invention will appear conductor witlioiit'extedingffarenoiighl tov as the following description -of,afpreferred,damage the enclosed wires.` i

andother embodiments thereof proceeds. The saw b'ladeisYnormallyretainedby the i ,In the drawings in which thefs'aine'charachandle 3 andnut 4, a; washerlTintervening. 85 Y ters of referenceareiisedin the several figbetweensaidl nut. land the adjacent end of"viires toden'ote identical par fts:f' f thesawl blade.v e This washer isan..l essential Figure l is a perspective View' ofthe hack feature oftheinventionyand its functiongin saw blade holder showing ablade in place;itsrelatio'n to the present combination is ,-i "'40 Figuref is aylongitudinal section through *entirely different from the *ordinary`func-19o the holder shownV in Figure 1, the intermetion of washers;V pdiateportion beingbroken away; e, Y

VFigure 3 is a cross section takenV along the ends of thehack sawbladeare convex, vthis f I 1 lineBf-Sof Figure 2; y f beingl theVshapejof the ordinary hack saw 34'5 Figure 4 is a cross section takenalong-the blade ofl commerce",V and i that the pealjof fao @..F'gure 5isaslight VInodificationfinl which 'extendswithinthe zone'of` thewasher', while Y the seating washer isof cupped form;

Fan interinediatefportion:ofsaid en dfsea'ts i i Figure 6is alongitudinal section through y{against-ifthe washergff/When the nut'cisf Y;

.se ya 4rriodiiiel:forni ofthe' invention, the-inter? screwed 'snuglyagainstlthewasher', and theiQ 'f i er becomes greater than the frictionbetween the washer andthe' small area-cime sairblade with which itcontacts the washer may rotate vwith the nut `relative to the endo-ffthe' Vsaw blade. 1 v Y In the absence ofthe V"washerA 7,*'it -would'beV Aimpossible to properly tighten the saw. blade in position, since,the saw blade being ofjhiohly'teinpe'red rnaterial,its first actionyupo'nbeing engaged'by the nut uwilljbe to 'dig intothematerial 'of thenut so as to'be non-rotatable with respect to the nut with theresult'that the lattercan be turned no fur- 1511951 v The 'endg/of thehandle Brisf'preferably slightly concave as indicated atS to receivevrthe oppositeconvex end of thesaw blade,

and itfis'unnecessary touse awasher atthis jpoint since thgehandle ishotkdesigned to be used in thfe' tighteningoperation,

The" handle does, however, .providean 'ini- 'portant adjustment.;Sawbladesfby dien Vent1manufacturers,'"or for that'inatter, byn `thesaine manufacturer, frequently dier' in. length by as rnulch as aquarterfofan inch yor more. The threadedrelation -of the handle.`with..reference to the section l' permits the .handle to be advanced.or' retracted relative- Z ;fvto the slotbyanf-amountsuflicienttocornfpensate for dierenceslin the length of the `saw blade,before any at'teinptisl made to y. tighten `are blade' in the hoijder.when Y l the` proper length of' slot has beenprevided,

different adiustrnentsefthe washer and nutV V Y 45 on the outer end ofthe sawV blade are adjusted .Y

i A' `vature of the endsA ofV the saw bladelie within f the hollow of.the-annulus afford-ed byethe-ton ofthedevcey Y, this-fconstruvction,thehandle-is] prof videdwith anotch l() .inthe end; adjacent the inthemanner Vpreviously described, vforcing thefoppositepend ofthe `saw bladeinto the recess ofjthe hand'lewithout producing any rotative'eiortbetween the Vsawblade andV handle. i' s A1 s- By virtueof *the fact thatth'ef'pea'lr ofcur-vv j v'washerfonthe onef'liand and by the Vrecess-ediend of ,theV handleon theV other hand.; ti'ghtening ofthefsaw'ibladealsoacts to rfarceV 1 Y the `saw blade backwardg'until iesffir'nily V:agziinst theinside wallQf` the section "l,diainetricallyopposite' to` the slot. A This avoidsV all chance ofthesawjblade being improperly Y V.seated` -and assures thatthelproperdepthfef cutshalljbeinaintainedatalltimes.,gj

The feati'ireflofthe slot `being substantially inconibinatienwithltheseating .and center- A s p 7 preferably `formed of softVInet-alsdthat if:` in the act of tightening Vthe vnut l, the frictionbetween the nit Land wash- 4 eventhough'the sawbladeis not` prop-V verlytightens'd. `A l Y ing functions of the washer and recessed end ofthe handle also prevent Vthe parts of the blade from falling vout ifltheblade 'should snap at an interinediatepoint. Thusthis saw provides forthe prolonged usefulness of the blade even if theV latter has beenbroken.V d j Referring now to that'forni of the iuvention shown inFigure 5, it will be noted that the washer 'is cupped shaped conform.A

ingrmore nearlytofthe curvature of the adj acent end of the saw blade.VThis enhances leaving the latter no larger in diameter 'than the pipesection itself; Thisperrnits the saw to be used through small openingsnotaccesstruction and the VVcost of Vthe device." f'

In Figure, the forward end of the section l is-left unthreadechthe slot:2ibeing1tervthe'security of the ,retentionV of the blade in sibletothatlforrn of the in'i'fention.shownin Vvi Y Figure 1,'in additionV itsimplifies .the con- Ininated short of the end of thefsection, and i theforward end wall offsaid slot being routed .have to be recessed theinanner shownk atV 8 in Figvgur'erl.V In installingia bladeinthis.V

out or -otherwiseffornied as shown; vatf9, so that it is oblique in theVdirectionof; ,the curva-v ture of the contactingendyof thesaw blade.

holder,the handleisj backed voff together with the washer Zuntilsufficient length ofLslot'is provided toy receive'the blade'.v'Ihehandle is then screwed toward lthe blade'forcingffllhe washerintoContact 'with thefbladeandin thev washer shown'in Figure 2.

thereby,v loosening,Y the jblade in.l the V c iperaconvenience fingrasping--; the holder, @the l T turnlforcing thefront end oftheblade'rinto ,contactwith.theendwall ofthe slot, 9, thejV Y .viasherfunctions -invrthis forrnbf the IlVQl; *110 tionin a manner eXaetlysimilar tofthat of* ,lnflfigurge 'is disclosed Va form of the in-p j"ventionginwhichthe `saw'blade;coacts-with the handle in-such a mannerajstoprevent the 2115 l {handle} rotating jand so `becoming `,loose andhandle is preferably providedwith aiiiatisujrga soft metalWasher-eifigageableY directly With variations in the length of the saivblade, and then turned untilthe notch comes in line with the slot 2. Thesavv blade is vthen inserted with 'one end in the slot l0, Whereupon thenut 4 is screwed so as to tighten the Washer 7 against the opposite endot the saw blade. j

lhile l have in the above description, dis-` closed what l have found tobe simple and practical embodiments' of the inventive principle, it isto be understood .that the invention is not to belimitedpto thesespecilic forms, but may be expressed iny such other physical'embodiments as may come .Within the scope oi, the appended claims.

What l claim is:

1 l. A holder for hack saw blades comprising `a tubular section having'aslot in oneV side lforftlie linsertion of a hack saW blade, said slotbeing of a Width to prevent lateral deflection of said blade, saidtubular sectionL having,l a zone or screw `threads at one end in-'tersected by said slot, said tubular. section beine rprovidedl Withmeans at the opposite end forming an abutment vfor said'savv blade,

andmeans, screwing on the saidthreaded end, against said blade fortightening the latter relative to said helder. l

2. A holder for hack saw blades comprising` a tubular section having aslot in one side for the insertion of a hack saw blade,=sa1dV slot beingof avvidth to ,preventl lateral delec-f l Y tion of said bla-de, saidtubular section having a zone of screw threads at one end intersected bysaid slot, saidtubul'ar section being provided With means at theopposite,endy forming an abutment for said saw bladeyand- `meansscrewing 'on' the saidv threaded end Y against` said bladetor-tightening. the' latter relativeA to said holder, said meansincluding the end of said blade. y f y 3. A holder-.for 'hack sawbladeswvhich have Convex ends, `comprrising a tubular secV tion havingfa slot inoneside for the-insertion of a hacl saw blade having a curvedend, said slot being of a Widthfto prevent lateral deflection offsaidblade-said tubular section having a zone of screwthreads at one/end,

Which'zone lis intersectedby said slot, said tubular section beingprovided. vv'ithvmeans at the opposite endforming an' abutment for i vture of said Washer. n

. 4. A holder for hack savv 'Y blades.v which? 'have convex ends,comprising atubular sec! 'tion having a slot in one side'for theinsertionv of a hack saw blade having a curvedend-and Vsaid sau7 blade,Aand means screwing on said threaded end 'for tightening said bladerela-i tive to saidholder, said means including an.l

aperturedv Washer directly engageable'v With the curved end oisaidiblade, the aperture of.

saidvvasher being greater than one-half the 'WidthV of said bladeVwhereby-1the-apex"y of curvature of said end extends linto the. aper-V`v*extends into said aperture.

- of'a Width to prevent lateral deiiection olf said blade, said tubularsection having azone .of f

means screvving on A'said' threaded end for sott .metal contact-ing"directly with: .the curved end of saidv blade, the 'aperture' of .screwthreads at one end, saidslot intersect- -ing said zone, said tubularsection being pro- -vided with, means at the opposite end forming anabutment for said saw. blade, and

.tightening said blade relativeto said holder, i rvsaid means includingan apertured'vvasher of. y

vvhicli'vvasher is .greater than one-hallc the v Width'r'of the sawblade, Wherebythe peak'of 'l curvature of theconvex end oif'saidsavv'blade VQ'A holder for hack Vfs'avv bladesivvhich -deniteextensionofthe Working side of said savv blade, Vand l. greater than one-half theyYWhich'said saw-blade is adapted'to beinserted Ito -adepthd'etermined'by the diameter Vofsaid bore, said slot being'ofavvvidthto prevent lat- V eral deflection of saidsaw blade,:'sai`dtubular section having a Zone of screvvjthreads at oneend intersectedl by'saidgslot, and bein-g `provided With'means .at-'an opposite end vforming anabutment 'for' said vsavv'fblade o n the side adjacentsaidslot, and means screvv-' ing on'fsaid threaded endy for tightening saidbladefrelative to said holder,"said meansin1 cluding anaperturedvvvasher the apertureof detiniteexten'sion of the Working Isideo'f'sai'd l have convex ends,`comprising a tubularfsec-v "tion, theborefdiameterofvvhichis lessthan n .the WidthV of said saw bladeto-determine a vvi'dth of said saw vbladewhereby'. the peak Qf, i

curvatureo said convex ends'lie's Within saidl bore,1-said tubularsection. having a slot in i 1 saw blade, and'greaterfthan oneihalf the f1# Wiel-,hof Saidsawbiaeie' wiieietythepeaklof l i curvature ofsaidlconvex endswlies Within said .1 bore, said tubular .sectionv havinga slotin which said savvbladeis adapted-to be inserted toa depthdetermined by the diameter of said bore, .said slot being kof a Width toprevent lateral deflection of said saw-blade, saidtubular section havingzones of screw threads atv f f ".120: .I 1'" handle screwedon oneend anda nut screwing on-theother end, and avva'sher of soft metal'.

its. opposite endsV intersected byl said slot, 'a

on said tubular section adjacent one 'of-said screvvingmembers arrangedto Vmake 'direct`v` contact. With the adjacenty end` of said saw' blade.y i Y.

hacksavvblades Which 7.v A. holder for have convex ends, comprisingaltubular sec-.-

tion,.the"bor.ediameter of vvhich'is less-than f the Width of said sawVblade'to determinea Y lateral deection of said saw blade, said tubua fdefinite extension ofv the Working side'of said saw blade, and greaterthan .one-half of the Width of said saw blade whereby the peak ofvcurvature offsaid eonvexendsl lies Within said bore, said tubular`section having a slot in which said smi/)12de is adapted t@ be inserted-f to adepth determined by the diameter of said bore, said slot being ofa Width to -Vprevent lar section having Zones of screw-threads at neachend interseetedby said slot, a handle Y f screwing on one end havinga notch in itsend 1, v. face adapted toregisterwith said slot and .Y

to receive the endof said saw blade,1V an adjusting nut screwing on theoppositefend Of said-tubular section, and a Washer Ofusoft tightened,saidfhandle having a iatfsurfaee have convex ends, comprising 'a tubularse@ lint-ion7` vthe borediameter of Whiehisless than Vthevvi'dth' efsaidsaw blade to.y determine a Y delinite'exten'sionl of the workingsideof said I savv blade, and "greater than one-half the -Width of said saw.blade whereby the peak of curvature of, said conve-X ends lies Withinsaid s bore, saidiubu'lar section having aslot in- Y f .which said sawblade is adapted to be inserted' w .s i

toa*depth'dete`r1nined bythe diameter ofsaid A Vborefsaid slot being` of-a Width togprevent lateralfdeection of, said savv bladegsa'id tubularsection havingja zone of screw threadsat l one end interse'eted by: saidslot, fandbeing provided-With'ineansj at an opposite end "forming anabutinentpforsaid saw' blade on Vlfthe' side -adjacentjsaidjslot,yandfrneans serevvingon said threaded end for tightening'said-bladerelative lte said holdergsaid means inffeludingvan apertured cupshapedwasher;thev

aperture ofwbicli is greater than one-half Y the Vvvidthlof thesawblade, saidwashe'r being With the adarranged vtQinake direct Contactjaeen'tend'of said blade.- 1'

- Intesti1nonywhereofIaix Iny signature.

- l f' '7 VVCHARLES BRACKETVT.

